Colleges in Rajasthan

Without doubt, post-graduation and Microbiology would be better as you will have lesser competition in this filed. Besides, the scope of Mircrobiolgists is increasing fast in India after the implementation of FSSAI clause on all food products. Even the large hotels now employ microbiologists.

No, you won't get admission in BITS-Pilani with 172 marks.

Hello Rishab,
Yes, certificate issued by NIOS is valid throughout India.

Hello Manjeet,
Yes, you can join preparatory programme. But, you will have to clear your 12th, before seeking admission for BA.

Hello Hitendra,
Here are few best engineering college apart from IITs and NITs:-
1. College of Engineering, Pune.
2. Anna University.
3. Jadavpur University.
4. Delhi Technological University (DTU).
5. NSIT, Delhi.
6. JNTU College of Engineering, Hyderabad.
7. Osmania University.
8. Coimbatore Institute of Technology.
9. College of Engineering Thiruvananthapuram.
10. Veer Surendra Sai University of Technology.